“Everyone was spent having watched loads of auditions but Ant and Dec thought it would be a good way to finish things off.

“The boys and Stephen had dog outfits made especially and performed a DJ set which went down a treat with the crowd despite no one having a clue who they were. The judges were in stitches when they stripped off at the end.”

Ant rejoined his TV partner and best pal at the helm of the show for this series after taking eight months off from work to seek help for addiction after a drink drive smash last year.

He made his return to work for the auditions, held earlier this year, and emotionally accepted the National Television Award for Best Presenter with Dec via video link.

Ant and Dec take part in unthinkable magic trick as magician gets the duo to sit the wrong way round on Britain's Got Talent